Using FAI 4.0.1 on a wheezy install server using a wheezy nfsroot with dracut works, when adding vers=3 in the pxelinux file. Here's my pxelinux config file:
default fai-generated label fai-generated kernel vmlinuz-3.2.0-2-amd64 append initrd=initrd.img-3.2.0-2-amd64 rw aufs ip=dhcp root=11.22.9.158:/srv/fai/nfsroot:vers=3 rd.shell FAI_FLAGS=verbose,sshd,createvt FAI_CONFIG_SRC=nfs://11.22.9.158/srv/fai/config FAI_ACTION=install rd.md=0 rd.dm=0 rd.lvm=0 rd.luks=0 vga=794 There's no need to disable nfsv4 on the install server. -- regards Thomas